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A paralogous decoy protects Phytophthora sojae apoplastic effector PsXEG1 from a host inhibitor

by Zhu, Lin , Zhang, Qi , Lin, Yachun , Song, Tianqiao , Kong, Liang , Tyler, Brett M. , Wang, Yan , Dong, Suomeng , Wang, Yang , Qiu, Min , Fang, Yufeng , Ma, Zhenchuan , Li, Haiyang , Ye, Wenwu , Zheng, Xiaobo , Xia, Yeqiang , Wang, Yuanchao

in Cellulase - antagonists & inhibitors / Cellulase - genetics / Cellulase - metabolism / Damage / Decoys / Effectors / Endoglucanase / Enzymatic activity / Enzyme activity / Enzymes / Extracellular Space - parasitology / Flowers & plants / Genes / Glucans - metabolism / Glycine max / Glycine max - enzymology / Glycine max - genetics / Glycine max - parasitology / Host-Pathogen Interactions / Infections / Inhibitors / Microorganisms / Oomycetes / Pathogens / Phytophthora / Phytophthora - enzymology / Phytophthora - genetics / Phytophthora - pathogenicity / Phytophthora parasitica / Phytophthora sojae / Plant Diseases - parasitology / Plant Proteins - genetics / Plant Proteins - metabolism / Plant tissues / Protein Binding / Proteins / Soybeans / Virulence / Xylans - metabolism / Xyloglucanase

2017

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A paralogous decoy protects Phytophthora sojae apoplastic effector PsXEG1 from a host inhibitor

2017

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A paralogous decoy protects Phytophthora sojae apoplastic effector PsXEG1 from a host inhibitor

2017

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Journal Article

A paralogous decoy protects Phytophthora sojae apoplastic effector PsXEG1 from a host inhibitor

Zhu, Lin,

Zhang, Qi,

Lin, Yachun,

Song, Tianqiao,

Kong, Liang,

Tyler, Brett M.,

Wang, Yan,

Dong, Suomeng,

Wang, Yang,

Qiu, Min,

Fang, Yufeng,

Ma, Zhenchuan,

Li, Haiyang,

Ye, Wenwu,

Zheng, Xiaobo,

Xia, Yeqiang,

Wang, Yuanchao

2017

Overview

The extracellular space (apoplast) of plant tissue represents a critical battleground between plants and attacking microbes. Here we show that a pathogen-secreted apoplastic xyloglucan-specific endoglucanase, PsXEG1, is a focus of this struggle in the Phytophthora sojae–soybean interaction. We show that soybean produces an apoplastic glucanase inhibitor protein, GmGIP1, that binds to PsXEG1 to block its contribution to virulence. P. sojae, however, secretes a paralogous PsXEG1-like protein, PsXLP1, that has lost enzyme activity but binds to GmGIP1 more tightly than does PsXEG1, thus freeing PsXEG1 to support P. sojae infection. The gene pair encoding PsXEG1 and PsXLP1 is conserved in many Phytophthora species, and the P. parasitica orthologs PpXEG1 and PpXLP1 have similar functions. Thus, this apoplastic decoy strategy may be widely used in Phytophthora pathosystems.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

Cellulase - antagonists & inhibitors

/ Cellulase - genetics

/ Cellulase - metabolism

/ Damage

/ Decoys

/ Effectors

/ Endoglucanase